// -*- C++ -*- //===----------------------------------------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #ifndef _LIBCPP_CONFIG #define _LIBCPP_CONFIG #include <__wrappers_config> #if defined(_MSC_VER) && !defined(__clang__) # if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) # define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER # endif #endif #ifndef _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER # pragma GCC system_header #endif // Move outside #ifdef __cplusplus because this needs to work in both C and C++ headers. #if defined(__apple_build_version__) # define _LIBCPP_COMPILER_CLANG_BASED # define _LIBCPP_APPLE_CLANG_VER (__apple_build_version__ / 10000) #elif defined(__clang__) #define _LIBCPP_COMPILER_CLANG # define _LIBCPP_COMPILER_CLANG_BASED # define _LIBCPP_CLANG_VER (__clang_major__ * 100 + __clang_minor__) #elif defined(__GNUC__) #define _LIBCPP_COMPILER_GCC #elif defined(_MSC_VER) #define _LIBCPP_COMPILER_MSVC #if _MSVC_LANG >= 201705L # define _LIBCPP_STD_VER 20 #elif _MSVC_LANG == 201703L # define _LIBCPP_STD_VER 17 #else # define _LIBCPP_STD_VER 14 #endif #define Y_UCRT_INCLUDE_NEXT(x) #define Y_MSVC_INCLUDE_NEXT(x) #elif defined(__IBMCPP__) #define _LIBCPP_COMPILER_IBM #endif #ifdef __cplusplus #define _LIBCPP_VERSION 15000 #if __STDC_HOSTED__ == 0 # define _LIBCPP_FREESTANDING #endif #ifndef _LIBCPP_STD_VER # if __cplusplus <= 201103L # define _LIBCPP_STD_VER 11 # elif __cplusplus <= 201402L # define _LIBCPP_STD_VER 14 # elif __cplusplus <= 201703L # define _LIBCPP_STD_VER 17 # elif __cplusplus <= 202002L # define _LIBCPP_STD_VER 20 # else # define _LIBCPP_STD_VER 22 // current year, or date of c++2b ratification # endif #endif // _LIBCPP_STD_VER #if defined(__ELF__) # define _LIBCPP_OBJECT_FORMAT_ELF 1 #elif defined(__MACH__) # define _LIBCPP_OBJECT_FORMAT_MACHO 1 #elif defined(_WIN32) || defined(__CYGWIN__) # define _LIBCPP_OBJECT_FORMAT_COFF 1 #elif defined(__wasm__) # define _LIBCPP_OBJECT_FORMAT_WASM 1 #else // ... add new file formats here ... #endif #if _LIBCPP_ABI_VERSION >= 2 // Change short string representation so that string data starts at offset 0, // improving its alignment in some cases. # define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT // Fix deque iterator type in order to support incomplete types. # define _LIBCPP_ABI_INCOMPLETE_TYPES_IN_DEQUE // Fix undefined behavior in how std::list stores its linked nodes. # define _LIBCPP_ABI_LIST_REMOVE_NODE_POINTER_UB // Fix undefined behavior in how __tree stores its end and parent nodes. # define _LIBCPP_ABI_TREE_REMOVE_NODE_POINTER_UB // Fix undefined behavior in how __hash_table stores its pointer types. # define _LIBCPP_ABI_FIX_UNORDERED_NODE_POINTER_UB # define _LIBCPP_ABI_FORWARD_LIST_REMOVE_NODE_POINTER_UB # define _LIBCPP_ABI_FIX_UNORDERED_CONTAINER_SIZE_TYPE // Define a key function for `bad_function_call` in the library, to centralize // its vtable and typeinfo to libc++ rather than having all other libraries // using that class define their own copies. # define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION // Override the default return value of exception::what() for // bad_function_call::what() with a string that is specific to // bad_function_call (see http://wg21.link/LWG2233). This is an ABI break // because it changes the vtable layout of bad_function_call. # define _LIBCPP_ABI_BAD_FUNCTION_CALL_GOOD_WHAT_MESSAGE // Enable optimized version of __do_get_(un)signed which avoids redundant copies. # define _LIBCPP_ABI_OPTIMIZED_LOCALE_NUM_GET // In C++20 and later, don't derive std::plus from std::binary_function, // nor std::negate from std::unary_function. # define _LIBCPP_ABI_NO_BINDER_BASES // Give reverse_iterator one data member of type T, not two. // Also, in C++17 and later, don't derive iterator types from std::iterator. # define _LIBCPP_ABI_NO_ITERATOR_BASES // Use the smallest possible integer type to represent the index of the variant. // Previously libc++ used "unsigned int" exclusively. # define _LIBCPP_ABI_VARIANT_INDEX_TYPE_OPTIMIZATION // Unstable attempt to provide a more optimized std::function #ifdef __EMSCRIPTEN__ // XXX EMSCRIPTEN https://github.com/emscripten-core/emscripten/issues/11022 //# define _LIBCPP_ABI_OPTIMIZED_FUNCTION #else # define _LIBCPP_ABI_OPTIMIZED_FUNCTION #endif // All the regex constants must be distinct and nonzero. # define _LIBCPP_ABI_REGEX_CONSTANTS_NONZERO // Use raw pointers, not wrapped ones, for std::span's iterator type. # define _LIBCPP_ABI_SPAN_POINTER_ITERATORS // Re-worked external template instantiations for std::string with a focus on // performance and fast-path inlining. # define _LIBCPP_ABI_STRING_OPTIMIZED_EXTERNAL_INSTANTIATION // Enable clang::trivial_abi on std::unique_ptr. # define _LIBCPP_ABI_ENABLE_UNIQUE_PTR_TRIVIAL_ABI // Enable clang::trivial_abi on std::shared_ptr and std::weak_ptr # define _LIBCPP_ABI_ENABLE_SHARED_PTR_TRIVIAL_ABI // std::random_device holds some state when it uses an implementation that gets // entropy from a file (see _LIBCPP_USING_DEV_RANDOM). When switching from this // implementation to another one on a platform that has already shipped // std::random_device, one needs to retain the same object layout to remain ABI // compatible. This switch removes these workarounds for platforms that don't care // about ABI compatibility. # define _LIBCPP_ABI_NO_RANDOM_DEVICE_COMPATIBILITY_LAYOUT // Remove basic_string common base # define _LIBCPP_ABI_DO_NOT_EXPORT_BASIC_STRING_COMMON // Remove vector base class # define _LIBCPP_ABI_DO_NOT_EXPORT_VECTOR_BASE_COMMON #elif _LIBCPP_ABI_VERSION == 1 # if !defined(_LIBCPP_OBJECT_FORMAT_COFF) // Enable compiling copies of now inline methods into the dylib to support // applications compiled against older libraries. This is unnecessary with // COFF dllexport semantics, since dllexport forces a non-inline definition // of inline functions to be emitted anyway. Our own non-inline copy would // conflict with the dllexport-emitted copy, so we disable it. # define _LIBCPP_DEPRECATED_ABI_LEGACY_LIBRARY_DEFINITIONS_FOR_INLINE_FUNCTIONS # endif // Feature macros for disabling pre ABI v1 features. All of these options // are deprecated. # if defined(__FreeBSD__) # define _LIBCPP_DEPRECATED_ABI_DISABLE_PAIR_TRIVIAL_COPY_CTOR # endif #endif #if defined(_LIBCPP_BUILDING_LIBRARY) || _LIBCPP_ABI_VERSION >= 2 // Enable additional explicit instantiations of iostreams components. This // reduces the number of weak definitions generated in programs that use // iostreams by providing a single strong definition in the shared library. # define _LIBCPP_ABI_ENABLE_ADDITIONAL_IOSTREAM_EXPLICIT_INSTANTIATIONS_1 // Define a key function for `bad_function_call` in the library, to centralize // its vtable and typeinfo to libc++ rather than having all other libraries // using that class define their own copies. # define _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION #endif #define _LIBCPP_TOSTRING2(x) #x #define _LIBCPP_TOSTRING(x) _LIBCPP_TOSTRING2(x) #if __cplusplus < 201103L && !defined(_LIBCPP_COMPILER_MSVC) #define _LIBCPP_CXX03_LANG #endif #ifndef __has_attribute #define __has_attribute(__x) 0 #endif #ifndef __has_builtin #define __has_builtin(__x) 0 #endif #ifndef __has_extension #define __has_extension(__x) 0 #endif #ifndef __has_feature #define __has_feature(__x) 0 #endif #ifndef __has_cpp_attribute #define __has_cpp_attribute(__x) 0 #endif // '__is_identifier' returns '0' if '__x' is a reserved identifier provided by // the compiler and '1' otherwise. #ifndef __is_identifier #define __is_identifier(__x) 1 #endif #ifndef __has_declspec_attribute #define __has_declspec_attribute(__x) 0 #endif #define __has_keyword(__x) !(__is_identifier(__x)) #ifndef __has_include #define __has_include(...) 0 #endif #if defined(_LIBCPP_COMPILER_GCC) && __cplusplus < 201103L #error "libc++ does not support using GCC with C++03. Please enable C++11" #endif // FIXME: ABI detection should be done via compiler builtin macros. This // is just a placeholder until Clang implements such macros. For now assume // that Windows compilers pretending to be MSVC++ target the Microsoft ABI, // and allow the user to explicitly specify the ABI to handle cases where this // heuristic falls short. #if defined(_LIBCPP_ABI_FORCE_ITANIUM) && defined(_LIBCPP_ABI_FORCE_MICROSOFT) # error "Only one of _LIBCPP_ABI_FORCE_ITANIUM and _LIBCPP_ABI_FORCE_MICROSOFT can be defined" #elif defined(_LIBCPP_ABI_FORCE_ITANIUM) # define _LIBCPP_ABI_ITANIUM #elif defined(_LIBCPP_ABI_FORCE_MICROSOFT) # define _LIBCPP_ABI_MICROSOFT #else # if defined(_WIN32) && defined(_MSC_VER) # define _LIBCPP_ABI_MICROSOFT # else # define _LIBCPP_ABI_ITANIUM # endif #endif #if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_NO_VCRUNTIME) # define _LIBCPP_ABI_VCRUNTIME #endif // Need to detect which libc we're using if we're on Linux. #if defined(__linux__) # include # if defined(__GLIBC_PREREQ) # define _LIBCPP_GLIBC_PREREQ(a, b) __GLIBC_PREREQ(a, b) # else # define _LIBCPP_GLIBC_PREREQ(a, b) 0 # endif // defined(__GLIBC_PREREQ) #endif // defined(__linux__) #if defined(__MVS__) # include // for __NATIVE_ASCII_F #endif #ifdef __LITTLE_ENDIAN__ # if __LITTLE_ENDIAN__ # define _LIBCPP_LITTLE_ENDIAN # endif // __LITTLE_ENDIAN__ #endif // __LITTLE_ENDIAN__ #ifdef __BIG_ENDIAN__ # if __BIG_ENDIAN__ # define _LIBCPP_BIG_ENDIAN # endif // __BIG_ENDIAN__ #endif // __BIG_ENDIAN__ #ifdef __BYTE_ORDER__ # if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ # define _LIBCPP_LITTLE_ENDIAN # elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ # define _LIBCPP_BIG_ENDIAN # endif // __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ #endif // __BYTE_ORDER__ #ifdef __FreeBSD__ # include # include # if _BYTE_ORDER == _LITTLE_ENDIAN # define _LIBCPP_LITTLE_ENDIAN # else // _BYTE_ORDER == _LITTLE_ENDIAN # define _LIBCPP_BIG_ENDIAN # endif // _BYTE_ORDER == _LITTLE_ENDIAN #endif // __FreeBSD__ #if defined(__NetBSD__) || defined(__OpenBSD__) # include # if _BYTE_ORDER == _LITTLE_ENDIAN # define _LIBCPP_LITTLE_ENDIAN # else // _BYTE_ORDER == _LITTLE_ENDIAN # define _LIBCPP_BIG_ENDIAN # endif // _BYTE_ORDER == _LITTLE_ENDIAN #endif // defined(__NetBSD__) || defined(__OpenBSD__) #if defined(_WIN32) # define _LIBCPP_WIN32API # define _LIBCPP_LITTLE_ENDIAN # define _LIBCPP_SHORT_WCHAR 1 // Both MinGW and native MSVC provide a "MSVC"-like environment # define _LIBCPP_MSVCRT_LIKE // If mingw not explicitly detected, assume using MS C runtime only if // a MS compatibility version is specified. # if defined(_MSC_VER) && !defined(__MINGW32__) # define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library # endif # if (defined(_M_AMD64) || defined(__x86_64__)) || (defined(_M_ARM) || defined(__arm__)) # define _LIBCPP_HAS_BITSCAN64 # endif # define _LIBCPP_HAS_OPEN_WITH_WCHAR # if defined(_LIBCPP_MSVCRT) # define _LIBCPP_HAS_QUICK_EXIT # endif // Some CRT APIs are unavailable to store apps # if defined(WINAPI_FAMILY) # include # if !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP) && \ (!defined(WINAPI_PARTITION_SYSTEM) || \ !WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_SYSTEM)) # define _LIBCPP_WINDOWS_STORE_APP # endif # endif #endif // defined(_WIN32) #ifdef __sun__ // #error to silence 'ya' include checks #error #include # ifdef _LITTLE_ENDIAN # define _LIBCPP_LITTLE_ENDIAN # else # define _LIBCPP_BIG_ENDIAN # endif #endif // __sun__ #if defined(_AIX) && !defined(__64BIT__) // The size of wchar is 2 byte on 32-bit mode on AIX. # define _LIBCPP_SHORT_WCHAR 1 #endif // Libc++ supports various implementations of std::random_device. // // _LIBCPP_USING_DEV_RANDOM // Read entropy from the given file, by default `/dev/urandom`. // If a token is provided, it is assumed to be the path to a file // to read entropy from. This is the default behavior if nothing // else is specified. This implementation requires storing state // inside `std::random_device`. // // _LIBCPP_USING_ARC4_RANDOM // Use arc4random(). This allows obtaining random data even when // using sandboxing mechanisms. On some platforms like Apple, this // is the recommended source of entropy for user-space programs. // When this option is used, the token passed to `std::random_device`'s // constructor *must* be "/dev/urandom" -- anything else is an error. // // _LIBCPP_USING_GETENTROPY // Use getentropy(). // When this option is used, the token passed to `std::random_device`'s // constructor *must* be "/dev/urandom" -- anything else is an error. // // _LIBCPP_USING_FUCHSIA_CPRNG // Use Fuchsia's zx_cprng_draw() system call, which is specified to // deliver high-quality entropy and cannot fail. // When this option is used, the token passed to `std::random_device`'s // constructor *must* be "/dev/urandom" -- anything else is an error. // // _LIBCPP_USING_NACL_RANDOM // NaCl's sandbox (which PNaCl also runs in) doesn't allow filesystem access, // including accesses to the special files under `/dev`. This implementation // uses the NaCL syscall `nacl_secure_random_init()` to get entropy. // When this option is used, the token passed to `std::random_device`'s // constructor *must* be "/dev/urandom" -- anything else is an error. // // _LIBCPP_USING_WIN32_RANDOM // Use rand_s(), for use on Windows. // When this option is used, the token passed to `std::random_device`'s // constructor *must* be "/dev/urandom" -- anything else is an error. #if defined(__OpenBSD__) || defined(__APPLE__) # define _LIBCPP_USING_ARC4_RANDOM #elif defined(__wasi__) # define _LIBCPP_USING_GETENTROPY #elif defined(__Fuchsia__) # define _LIBCPP_USING_FUCHSIA_CPRNG #elif defined(__native_client__) # define _LIBCPP_USING_NACL_RANDOM #elif defined(_LIBCPP_WIN32API) # define _LIBCPP_USING_WIN32_RANDOM #else # define _LIBCPP_USING_DEV_RANDOM #endif #if !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) # include # if __BYTE_ORDER == __LITTLE_ENDIAN # define _LIBCPP_LITTLE_ENDIAN # elif __BYTE_ORDER == __BIG_ENDIAN # define _LIBCPP_BIG_ENDIAN # else // __BYTE_ORDER == __BIG_ENDIAN # error unable to determine endian # endif #endif // !defined(_LIBCPP_LITTLE_ENDIAN) && !defined(_LIBCPP_BIG_ENDIAN) #if __has_attribute(__no_sanitize__) && !defined(_LIBCPP_COMPILER_GCC) # define _LIBCPP_NO_CFI __attribute__((__no_sanitize__("cfi"))) #else # define _LIBCPP_NO_CFI #endif // If the compiler supports using_if_exists, pretend we have those functions and they'll // be picked up if the C library provides them. // // TODO: Once we drop support for Clang 12, we can assume the compiler supports using_if_exists // for platforms that don't have a conforming C11 library, so we can drop this whole thing. #if __has_attribute(using_if_exists) # define _LIBCPP_HAS_TIMESPEC_GET # define _LIBCPP_HAS_QUICK_EXIT # ifndef _LIBCPP_MSVCRT # define _LIBCPP_HAS_ALIGNED_ALLOC # endif #else #if (defined(__ISO_C_VISIBLE) && (__ISO_C_VISIBLE >= 2011)) || __cplusplus >= 201103L # if defined(__FreeBSD__) # define _LIBCPP_HAS_ALIGNED_ALLOC # define _LIBCPP_HAS_QUICK_EXIT # if __FreeBSD_version >= 1300064 || \ (__FreeBSD_version >= 1201504 && __FreeBSD_version < 1300000) # define _LIBCPP_HAS_TIMESPEC_GET # endif # elif defined(__BIONIC__) # if __ANDROID_API__ >= 21 # define _LIBCPP_HAS_QUICK_EXIT # endif # if __ANDROID_API__ >= 28 # define _LIBCPP_HAS_ALIGNED_ALLOC # endif # if __ANDROID_API__ >= 29 # define _LIBCPP_HAS_TIMESPEC_GET # endif # elif defined(__Fuchsia__) || defined(__wasi__) || defined(__NetBSD__) # define _LIBCPP_HAS_ALIGNED_ALLOC # define _LIBCPP_HAS_QUICK_EXIT # define _LIBCPP_HAS_TIMESPEC_GET # elif defined(__OpenBSD__) # define _LIBCPP_HAS_ALIGNED_ALLOC # define _LIBCPP_HAS_TIMESPEC_GET # elif defined(__linux__) # if !defined(_LIBCPP_HAS_MUSL_LIBC) # if _LIBCPP_GLIBC_PREREQ(2, 15) || defined(__BIONIC__) # define _LIBCPP_HAS_QUICK_EXIT # endif # if _LIBCPP_GLIBC_PREREQ(2, 17) # define _LIBCPP_HAS_ALIGNED_ALLOC # define _LIBCPP_HAS_TIMESPEC_GET # endif # else // defined(_LIBCPP_HAS_MUSL_LIBC) # define _LIBCPP_HAS_ALIGNED_ALLOC # define _LIBCPP_HAS_QUICK_EXIT # define _LIBCPP_HAS_TIMESPEC_GET # endif # elif defined(_LIBCPP_MSVCRT) // Using Microsoft's C Runtime library, not MinGW # define _LIBCPP_HAS_TIMESPEC_GET # elif defined(__APPLE__) // timespec_get and aligned_alloc were introduced in macOS 10.15 and // aligned releases # if ((defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101500) || \ (defined(__ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_IPHONE_OS_VERSION_MIN_REQUIRED__ >= 130000) || \ (defined(__ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_TV_OS_VERSION_MIN_REQUIRED__ >= 130000) || \ (defined(__ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__) && __ENVIRONMENT_WATCH_OS_VERSION_MIN_REQUIRED__ >= 60000)) # define _LIBCPP_HAS_ALIGNED_ALLOC # define _LIBCPP_HAS_TIMESPEC_GET # endif # endif // __APPLE__ #endif #endif // __has_attribute(using_if_exists) #ifndef _LIBCPP_CXX03_LANG # define _LIBCPP_ALIGNOF(_Tp) alignof(_Tp) #elif defined(_LIBCPP_COMPILER_CLANG_BASED) # define _LIBCPP_ALIGNOF(_Tp) _Alignof(_Tp) #else # error "We don't know a correct way to implement alignof(T) in C++03 outside of Clang" #endif #define _LIBCPP_PREFERRED_ALIGNOF(_Tp) __alignof(_Tp) #if defined(_LIBCPP_COMPILER_CLANG_BASED) #if defined(_LIBCPP_ALTERNATE_STRING_LAYOUT) # error _LIBCPP_ALTERNATE_STRING_LAYOUT is deprecated, please use _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT instead #endif #if defined(__APPLE__) && !defined(__i386__) && !defined(__x86_64__) && \ (!defined(__arm__) || __ARM_ARCH_7K__ >= 2) # define _LIBCPP_ABI_ALTERNATE_STRING_LAYOUT #endif #if __has_feature(cxx_alignas) # define _ALIGNAS_TYPE(x) alignas(x) # define _ALIGNAS(x) alignas(x) #else # define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) # define _ALIGNAS(x) __attribute__((__aligned__(x))) #endif #if __cplusplus < 201103L typedef __char16_t char16_t; typedef __char32_t char32_t; #endif #if !__has_feature(cxx_exceptions) # define _LIBCPP_NO_EXCEPTIONS #endif #if !(__has_feature(cxx_strong_enums)) #define _LIBCPP_HAS_NO_STRONG_ENUMS #endif #if __has_feature(cxx_attributes) # define _LIBCPP_NORETURN [[noreturn]] #else # define _LIBCPP_NORETURN __attribute__ ((noreturn)) #endif #ifdef _LIBCPP_CXX03_LANG # define nullptr __nullptr #endif // Objective-C++ features (opt-in) #if __has_feature(objc_arc) #define _LIBCPP_HAS_OBJC_ARC #endif #if __has_feature(objc_arc_weak) #define _LIBCPP_HAS_OBJC_ARC_WEAK #endif #if __has_extension(blocks) # define _LIBCPP_HAS_EXTENSION_BLOCKS #endif #if defined(_LIBCPP_HAS_EXTENSION_BLOCKS) && defined(__APPLE__) # define _LIBCPP_HAS_BLOCKS_RUNTIME #endif #if !(__has_feature(cxx_noexcept)) #define _LIBCPP_HAS_NO_NOEXCEPT #endif #if !__has_feature(address_sanitizer) #define _LIBCPP_HAS_NO_ASAN #endif // Allow for build-time disabling of unsigned integer sanitization #if __has_attribute(no_sanitize) #define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK __attribute__((__no_sanitize__("unsigned-integer-overflow"))) #endif #define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) #define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ #elif defined(_LIBCPP_COMPILER_GCC) #define _ALIGNAS(x) __attribute__((__aligned__(x))) #define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) #define _LIBCPP_NORETURN __attribute__((noreturn)) #if !defined(__EXCEPTIONS) # define _LIBCPP_NO_EXCEPTIONS #endif #if !defined(__SANITIZE_ADDRESS__) #define _LIBCPP_HAS_NO_ASAN #endif #define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) #define _LIBCPP_DISABLE_EXTENSION_WARNING __extension__ #elif defined(_LIBCPP_COMPILER_MSVC) #define _LIBCPP_WARNING(x) __pragma(message(__FILE__ "(" _LIBCPP_TOSTRING(__LINE__) ") : warning note: " x)) #if _MSC_VER < 1900 #error "MSVC versions prior to Visual Studio 2015 are not supported" #endif #define _LIBCPP_HAS_IS_FINAL #define __alignof__ __alignof #define _LIBCPP_NORETURN __declspec(noreturn) #define _ALIGNAS(x) __declspec(align(x)) #define _ALIGNAS_TYPE(x) alignas(x) #define _LIBCPP_UNDERLYING_TYPE(T) __underlying_type(T) #define _LIBCPP_IS_LITERAL(T) __is_literal_type(T) #undef __has_feature #define __has_feature(x) __has_feature_##x #define __has_feature_is_standard_layout 1 #define __has_feature_is_trivially_copyable 1 #define __has_feature_is_trivial 1 #define __has_feature_is_pod 1 #define __has_feature_cxx_noexcept 1 #define __has_feature_has_nothrow_assign 1 #define __has_feature_is_union 1 #define __has_feature_is_class 1 #define __has_feature_is_enum 1 #define __has_feature_is_convertible_to 1 #define __has_feature_is_empty 1 #define __has_feature_is_polymorphic 1 #define __has_feature_has_virtual_destructor 1 #define __has_feature_cxx_reference_qualified_functions 1 #define __has_feature_is_constructible 1 #define __has_feature_is_trivially_constructible 1 #define __has_feature_is_trivially_assignable 1 #define __has_feature_is_convertible_to 1 #define __has_feature_has_trivial_constructor 1 #define __has_feature_has_trivial_destructor 1 #define __has_feature_has_nothrow_constructor 1 #define __has_feature_has_nothrow_copy 1 #define __has_feature_cxx_explicit_conversions 1 #undef __has_builtin #define __has_builtin(x) __has_builtin_##x #define __has_builtin___builtin_addressof 1 #if defined(_MSC_VER) && defined(__CUDACC__) // nvcc fails to compile __builtin_is_constant_evaluated() at the time # define _LIBCPP_HAS_NO_BUILTIN_IS_CONSTANT_EVALUATED 1 #else # define __has_builtin___builtin_is_constant_evaluated 1 #endif #define _LIBCPP_WEAK #define _LIBCPP_HAS_NO_ASAN #define _LIBCPP_ALWAYS_INLINE __forceinline #define _LIBCPP_HAS_NO_VECTOR_EXTENSION #define _LIBCPP_DISABLE_EXTENSION_WARNING #elif defined(_LIBCPP_COMPILER_IBM) #define _ALIGNAS(x) __attribute__((__aligned__(x))) #define _ALIGNAS_TYPE(x) __attribute__((__aligned__(_LIBCPP_ALIGNOF(x)))) #define _ATTRIBUTE(x) __attribute__((x)) #define _LIBCPP_NORETURN __attribute__((noreturn)) #define _LIBCPP_HAS_NO_UNICODE_CHARS #if defined(_AIX) #define __MULTILOCALE_API #endif #define _LIBCPP_HAS_NO_ASAN #define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__)) #define _LIBCPP_HAS_NO_VECTOR_EXTENSION #define _LIBCPP_DISABLE_EXTENSION_WARNING #endif // _LIBCPP_COMPILER_[CLANG|GCC|MSVC|IBM] #if defined(_LIBCPP_OBJECT_FORMAT_COFF) #ifdef _DLL # define _LIBCPP_CRT_FUNC __declspec(dllimport) #else # define _LIBCPP_CRT_FUNC #endif #if defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) # define _LIBCPP_DLL_VIS # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS # define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS # define _LIBCPP_OVERRIDABLE_FUNC_VIS # define _LIBCPP_EXPORTED_FROM_ABI #elif defined(_LIBCPP_BUILDING_LIBRARY) # define _LIBCPP_DLL_VIS __declspec(dllexport) # if defined(__MINGW32__) # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS # define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS # else # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS # define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS _LIBCPP_DLL_VIS # endif # define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_DLL_VIS # define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllexport) #else # define _LIBCPP_DLL_VIS __declspec(dllimport) # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS _LIBCPP_DLL_VIS # define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS # define _LIBCPP_OVERRIDABLE_FUNC_VIS # define _LIBCPP_EXPORTED_FROM_ABI __declspec(dllimport) #endif #define _LIBCPP_TYPE_VIS _LIBCPP_DLL_VIS #define _LIBCPP_FUNC_VIS _LIBCPP_DLL_VIS #define _LIBCPP_EXCEPTION_ABI _LIBCPP_DLL_VIS #define _LIBCPP_HIDDEN #define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS #define _LIBCPP_TEMPLATE_VIS #define _LIBCPP_TEMPLATE_DATA_VIS #define _LIBCPP_ENUM_VIS #endif // defined(_LIBCPP_OBJECT_FORMAT_COFF) #ifndef _LIBCPP_HIDDEN # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) # define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden"))) # else # define _LIBCPP_HIDDEN # endif #endif #ifndef _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) // The inline should be removed once PR32114 is resolved # define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS inline _LIBCPP_HIDDEN # else # define _LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS # endif #endif #ifndef _LIBCPP_FUNC_VIS # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) # define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default"))) # else # define _LIBCPP_FUNC_VIS # endif #endif #ifndef _LIBCPP_TYPE_VIS # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) # define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default"))) # else # define _LIBCPP_TYPE_VIS # endif #endif #ifndef _LIBCPP_TEMPLATE_VIS # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) # if __has_attribute(__type_visibility__) # define _LIBCPP_TEMPLATE_VIS __attribute__ ((__type_visibility__("default"))) # else # define _LIBCPP_TEMPLATE_VIS __attribute__ ((__visibility__("default"))) # endif # else # define _LIBCPP_TEMPLATE_VIS # endif #endif #ifndef _LIBCPP_TEMPLATE_DATA_VIS # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) # define _LIBCPP_TEMPLATE_DATA_VIS __attribute__ ((__visibility__("default"))) # else # define _LIBCPP_TEMPLATE_DATA_VIS # endif #endif #ifndef _LIBCPP_EXPORTED_FROM_ABI # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) # define _LIBCPP_EXPORTED_FROM_ABI __attribute__((__visibility__("default"))) # else # define _LIBCPP_EXPORTED_FROM_ABI # endif #endif #ifndef _LIBCPP_OVERRIDABLE_FUNC_VIS #define _LIBCPP_OVERRIDABLE_FUNC_VIS _LIBCPP_FUNC_VIS #endif #ifndef _LIBCPP_EXCEPTION_ABI # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) # define _LIBCPP_EXCEPTION_ABI __attribute__ ((__visibility__("default"))) # else # define _LIBCPP_EXCEPTION_ABI # endif #endif #ifndef _LIBCPP_ENUM_VIS # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) && __has_attribute(__type_visibility__) # define _LIBCPP_ENUM_VIS __attribute__ ((__type_visibility__("default"))) # else # define _LIBCPP_ENUM_VIS # endif #endif #ifndef _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS __attribute__ ((__visibility__("default"))) # else # define _LIBCPP_EXTERN_TEMPLATE_TYPE_VIS # endif #endif #ifndef _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS #define _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS #endif #if __has_attribute(internal_linkage) # define _LIBCPP_INTERNAL_LINKAGE __attribute__ ((internal_linkage)) #else # define _LIBCPP_INTERNAL_LINKAGE _LIBCPP_ALWAYS_INLINE #endif #if __has_attribute(exclude_from_explicit_instantiation) # define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION __attribute__ ((__exclude_from_explicit_instantiation__)) #else // Try to approximate the effect of exclude_from_explicit_instantiation // (which is that entities are not assumed to be provided by explicit // template instantiations in the dylib) by always inlining those entities. #ifdef _LIBCPP_COMPILER_MSVC # define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION #else # define _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION _LIBCPP_ALWAYS_INLINE #endif #endif #ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU # ifndef _LIBCPP_HIDE_FROM_ABI_PER_TU_BY_DEFAULT # define _LIBCPP_HIDE_FROM_ABI_PER_TU 0 # else # define _LIBCPP_HIDE_FROM_ABI_PER_TU 1 # endif #endif #ifndef _LIBCPP_HIDE_FROM_ABI # if _LIBCPP_HIDE_FROM_ABI_PER_TU # define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_INTERNAL_LINKAGE # else # define _LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDDEN _LIBCPP_EXCLUDE_FROM_EXPLICIT_INSTANTIATION # endif #endif #ifdef _LIBCPP_BUILDING_LIBRARY # if _LIBCPP_ABI_VERSION > 1 # define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI # else # define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 # endif #else # define _LIBCPP_HIDE_FROM_ABI_AFTER_V1 _LIBCPP_HIDE_FROM_ABI #endif // Just so we can migrate to the new macros gradually. #define _LIBCPP_INLINE_VISIBILITY _LIBCPP_HIDE_FROM_ABI // Inline namespaces are available in Clang/GCC/MSVC regardless of C++ dialect. #define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { inline namespace _LIBCPP_ABI_NAMESPACE { #define _LIBCPP_END_NAMESPACE_STD } } #define _VSTD std _LIBCPP_BEGIN_NAMESPACE_STD _LIBCPP_END_NAMESPACE_STD #if _LIBCPP_STD_VER > 14 #define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ _LIBCPP_BEGIN_NAMESPACE_STD inline namespace __fs { namespace filesystem { #else #define _LIBCPP_BEGIN_NAMESPACE_FILESYSTEM \ _LIBCPP_BEGIN_NAMESPACE_STD namespace __fs { namespace filesystem { #endif #define _LIBCPP_END_NAMESPACE_FILESYSTEM \ _LIBCPP_END_NAMESPACE_STD } } #define _VSTD_FS std::__fs::filesystem #if __has_attribute(__enable_if__) # define _LIBCPP_PREFERRED_OVERLOAD __attribute__ ((__enable_if__(true, ""))) #endif #ifndef _LIBCPP_HAS_NO_NOEXCEPT # define _NOEXCEPT noexcept # define _NOEXCEPT_(x) noexcept(x) #else # define _NOEXCEPT throw() # define _NOEXCEPT_(x) #endif #ifdef _LIBCPP_HAS_NO_UNICODE_CHARS typedef unsigned short char16_t; typedef unsigned int char32_t; #endif #ifndef __SIZEOF_INT128__ #define _LIBCPP_HAS_NO_INT128 #endif #ifdef _LIBCPP_CXX03_LANG # define static_assert(...) _Static_assert(__VA_ARGS__) # define decltype(...) __decltype(__VA_ARGS__) #endif // _LIBCPP_CXX03_LANG #ifdef _LIBCPP_CXX03_LANG # define _LIBCPP_CONSTEXPR #else # define _LIBCPP_CONSTEXPR constexpr #endif #ifndef __cpp_consteval # define _LIBCPP_CONSTEVAL _LIBCPP_CONSTEXPR #else # define _LIBCPP_CONSTEVAL consteval #endif // Even modern versions of MSVC toolkit have issues compiling libc++'s concepts-related code #if _LIBCPP_STD_VER <= 17 || defined(_LIBCPP_COMPILER_MSVC) || !defined(__cpp_concepts) || __cpp_concepts < 201907L #define _LIBCPP_HAS_NO_CONCEPTS #endif #ifdef __GNUC__ # define _LIBCPP_NOALIAS __attribute__((__malloc__)) #else # define _LIBCPP_NOALIAS #endif #if __has_attribute(using_if_exists) # define _LIBCPP_USING_IF_EXISTS __attribute__((using_if_exists)) #else # define _LIBCPP_USING_IF_EXISTS #endif #ifdef _LIBCPP_HAS_NO_STRONG_ENUMS # define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx # define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \ __lx __v_; \ _LIBCPP_INLINE_VISIBILITY x(__lx __v) : __v_(__v) {} \ _LIBCPP_INLINE_VISIBILITY explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \ _LIBCPP_INLINE_VISIBILITY operator int() const {return __v_;} \ }; #else // _LIBCPP_HAS_NO_STRONG_ENUMS # define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_ENUM_VIS x # define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) #endif // _LIBCPP_HAS_NO_STRONG_ENUMS // _LIBCPP_DEBUG potential values: // - undefined: No assertions. This is the default. // - 0: Basic assertions // - 1: Basic assertions + iterator validity checks + unspecified behavior randomization. # if !defined(_LIBCPP_DEBUG) # define _LIBCPP_DEBUG_LEVEL 0 # elif _LIBCPP_DEBUG == 0 # define _LIBCPP_DEBUG_LEVEL 1 # elif _LIBCPP_DEBUG == 1 # define _LIBCPP_DEBUG_LEVEL 2 # else # error Supported values for _LIBCPP_DEBUG are 0 and 1 # endif # if _LIBCPP_DEBUG_LEVEL >= 2 && !defined(_LIBCPP_CXX03_LANG) # define _LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY # endif # if defined(_LIBCPP_DEBUG_RANDOMIZE_UNSPECIFIED_STABILITY) # if defined(_LIBCPP_CXX03_LANG) # error Support for unspecified stability is only for C++11 and higher # endif # define _LIBCPP_DEBUG_RANDOMIZE_RANGE(__first, __last) \ do { \ if (!__builtin_is_constant_evaluated()) \ _VSTD::shuffle(__first, __last, __libcpp_debug_randomizer()); \ } while (false) # else # define _LIBCPP_DEBUG_RANDOMIZE_RANGE(__first, __last) \ do { \ } while (false) # endif // Libc++ allows disabling extern template instantiation declarations by // means of users defining _LIBCPP_DISABLE_EXTERN_TEMPLATE. // // Furthermore, when the Debug mode is enabled, we disable extern declarations // when building user code because we don't want to use the functions compiled // in the library, which might not have had the debug mode enabled when built. // However, some extern declarations need to be used, because code correctness // depends on it (several instances in ). Those special declarations // are declared with _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE, which is enabled // even when the debug mode is enabled. #if defined(_LIBCPP_DISABLE_EXTERN_TEMPLATE) # define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */ # define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) /* nothing */ #elif _LIBCPP_DEBUG_LEVEL >= 1 && !defined(_LIBCPP_BUILDING_LIBRARY) # define _LIBCPP_EXTERN_TEMPLATE(...) /* nothing */ # define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__; #else # define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__; # define _LIBCPP_EXTERN_TEMPLATE_EVEN_IN_DEBUG_MODE(...) extern template __VA_ARGS__; #endif #if defined(__APPLE__) || defined(__FreeBSD__) || defined(_LIBCPP_MSVCRT_LIKE) || \ defined(__sun__) || defined(__NetBSD__) #define _LIBCPP_LOCALE__L_EXTENSIONS 1 #endif #ifdef __FreeBSD__ #define _DECLARE_C99_LDBL_MATH 1 #endif // If we are getting operator new from the MSVC CRT, then allocation overloads // for align_val_t were added in 19.12, aka VS 2017 version 15.3. #if defined(_LIBCPP_MSVCRT) && defined(_MSC_VER) && _MSC_VER < 1912 # define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION #elif defined(_LIBCPP_ABI_VCRUNTIME) && !defined(__cpp_aligned_new) // We're deferring to Microsoft's STL to provide aligned new et al. We don't // have it unless the language feature test macro is defined. # define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION #elif defined(__MVS__) # define _LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION #endif #if defined(_LIBCPP_HAS_NO_LIBRARY_ALIGNED_ALLOCATION) || \ (!defined(__cpp_aligned_new) || __cpp_aligned_new < 201606) # define _LIBCPP_HAS_NO_ALIGNED_ALLOCATION #endif #if defined(__APPLE__) || defined(__FreeBSD__) #define _LIBCPP_HAS_DEFAULTRUNELOCALE #endif #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__) #define _LIBCPP_WCTYPE_IS_MASK #endif #if _LIBCPP_STD_VER <= 17 || !defined(__cpp_char8_t) #define _LIBCPP_HAS_NO_CHAR8_T #endif // Deprecation macros. // // Deprecations warnings are always enabled, except when users explicitly opt-out // by defining _LIBCPP_DISABLE_DEPRECATION_WARNINGS. #if !defined(_LIBCPP_DISABLE_DEPRECATION_WARNINGS) # if __has_attribute(deprecated) # define _LIBCPP_DEPRECATED __attribute__ ((deprecated)) # elif _LIBCPP_STD_VER > 11 # define _LIBCPP_DEPRECATED [[deprecated]] # else # define _LIBCPP_DEPRECATED # endif #else # define _LIBCPP_DEPRECATED #endif #if !defined(_LIBCPP_CXX03_LANG) # define _LIBCPP_DEPRECATED_IN_CXX11 _LIBCPP_DEPRECATED #else # define _LIBCPP_DEPRECATED_IN_CXX11 #endif #if _LIBCPP_STD_VER > 11 # define _LIBCPP_DEPRECATED_IN_CXX14 _LIBCPP_DEPRECATED #else # define _LIBCPP_DEPRECATED_IN_CXX14 #endif #if _LIBCPP_STD_VER > 14 # define _LIBCPP_DEPRECATED_IN_CXX17 _LIBCPP_DEPRECATED #else # define _LIBCPP_DEPRECATED_IN_CXX17 #endif #if _LIBCPP_STD_VER > 17 # define _LIBCPP_DEPRECATED_IN_CXX20 _LIBCPP_DEPRECATED #else # define _LIBCPP_DEPRECATED_IN_CXX20 #endif #if !defined(_LIBCPP_HAS_NO_CHAR8_T) # define _LIBCPP_DEPRECATED_WITH_CHAR8_T _LIBCPP_DEPRECATED #else # define _LIBCPP_DEPRECATED_WITH_CHAR8_T #endif #if defined(_LIBCPP_COMPILER_CLANG_BASED) || defined(_LIBCPP_COMPILER_GCC) # define _LIBCPP_SUPPRESS_DEPRECATED_PUSH \ _Pragma("GCC diagnostic push") \ _Pragma("GCC diagnostic ignored \"-Wdeprecated\"") \ _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") # define _LIBCPP_SUPPRESS_DEPRECATED_POP \ _Pragma("GCC diagnostic pop") #else # define _LIBCPP_SUPPRESS_DEPRECATED_PUSH # define _LIBCPP_SUPPRESS_DEPRECATED_POP #endif #if _LIBCPP_STD_VER <= 11 # define _LIBCPP_EXPLICIT_AFTER_CXX11 #else # define _LIBCPP_EXPLICIT_AFTER_CXX11 explicit #endif #if _LIBCPP_STD_VER > 11 # define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr #else # define _LIBCPP_CONSTEXPR_AFTER_CXX11 #endif #if _LIBCPP_STD_VER > 14 # define _LIBCPP_CONSTEXPR_AFTER_CXX14 constexpr #else # define _LIBCPP_CONSTEXPR_AFTER_CXX14 #endif #if _LIBCPP_STD_VER > 17 # define _LIBCPP_CONSTEXPR_AFTER_CXX17 constexpr #else # define _LIBCPP_CONSTEXPR_AFTER_CXX17 #endif #if __has_cpp_attribute(nodiscard) || defined(_LIBCPP_COMPILER_MSVC) # define _LIBCPP_NODISCARD [[nodiscard]] #elif defined(_LIBCPP_COMPILER_CLANG_BASED) && !defined(_LIBCPP_CXX03_LANG) # define _LIBCPP_NODISCARD [[clang::warn_unused_result]] #else // We can't use GCC's [[gnu::warn_unused_result]] and // __attribute__((warn_unused_result)), because GCC does not silence them via // (void) cast. # define _LIBCPP_NODISCARD #endif // _LIBCPP_NODISCARD_EXT may be used to apply [[nodiscard]] to entities not // specified as such as an extension. #if defined(_LIBCPP_ENABLE_NODISCARD) && !defined(_LIBCPP_DISABLE_NODISCARD_EXT) # define _LIBCPP_NODISCARD_EXT _LIBCPP_NODISCARD #else # define _LIBCPP_NODISCARD_EXT #endif #if !defined(_LIBCPP_DISABLE_NODISCARD_AFTER_CXX17) && \ (_LIBCPP_STD_VER > 17 || defined(_LIBCPP_ENABLE_NODISCARD)) # define _LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_NODISCARD #else # define _LIBCPP_NODISCARD_AFTER_CXX17 #endif #if __has_attribute(no_destroy) # define _LIBCPP_NO_DESTROY __attribute__((__no_destroy__)) #else # define _LIBCPP_NO_DESTROY #endif #ifndef _LIBCPP_HAS_NO_ASAN extern "C" _LIBCPP_FUNC_VIS void __sanitizer_annotate_contiguous_container( const void *, const void *, const void *, const void *); #endif // Try to find out if RTTI is disabled. #if defined(_LIBCPP_COMPILER_CLANG_BASED) && !__has_feature(cxx_rtti) # define _LIBCPP_NO_RTTI #elif defined(__GNUC__) && !defined(__GXX_RTTI) # define _LIBCPP_NO_RTTI #elif defined(_LIBCPP_COMPILER_MSVC) && !defined(_CPPRTTI) # define _LIBCPP_NO_RTTI #endif #ifndef _LIBCPP_WEAK #define _LIBCPP_WEAK __attribute__((__weak__)) #endif // Thread API #if !defined(_LIBCPP_HAS_NO_THREADS) && \ !defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && \ !defined(_LIBCPP_HAS_THREAD_API_WIN32) && \ !defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) # if defined(__FreeBSD__) || \ defined(__wasi__) || \ defined(__NetBSD__) || \ defined(__OpenBSD__) || \ defined(__NuttX__) || \ defined(__linux__) || \ defined(__GNU__) || \ defined(__APPLE__) || \ defined(__sun__) || \ defined(__MVS__) || \ defined(_AIX) || \ defined(__CYGWIN__) # define _LIBCPP_HAS_THREAD_API_PTHREAD # elif defined(__Fuchsia__) // TODO(44575): Switch to C11 thread API when possible. # define _LIBCPP_HAS_THREAD_API_PTHREAD # elif defined(_LIBCPP_WIN32API) # define _LIBCPP_HAS_THREAD_API_WIN32 # else # error "No thread API" # endif // _LIBCPP_HAS_THREAD_API #endif // _LIBCPP_HAS_NO_THREADS #if defined(_LIBCPP_HAS_THREAD_API_PTHREAD) #if defined(__ANDROID__) && __ANDROID_API__ >= 30 #define _LIBCPP_HAS_COND_CLOCKWAIT #elif defined(_LIBCPP_GLIBC_PREREQ) #if _LIBCPP_GLIBC_PREREQ(2, 30) #define _LIBCPP_HAS_COND_CLOCKWAIT #endif #endif #endif #if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_PTHREAD) #error _LIBCPP_HAS_THREAD_API_PTHREAD may only be defined when \ _LIBCPP_HAS_NO_THREADS is not defined. #endif #if defined(_LIBCPP_HAS_NO_THREADS) && defined(_LIBCPP_HAS_THREAD_API_EXTERNAL) #error _LIBCPP_HAS_THREAD_API_EXTERNAL may not be defined when \ _LIBCPP_HAS_NO_THREADS is defined. #endif #if defined(_LIBCPP_HAS_NO_MONOTONIC_CLOCK) && !defined(_LIBCPP_HAS_NO_THREADS) #error _LIBCPP_HAS_NO_MONOTONIC_CLOCK may only be defined when \ _LIBCPP_HAS_NO_THREADS is defined. #endif #if !defined(_LIBCPP_HAS_NO_THREADS) && !defined(__STDCPP_THREADS__) #define __STDCPP_THREADS__ 1 #endif // The glibc and Bionic implementation of pthreads implements // pthread_mutex_destroy as nop for regular mutexes. Additionally, Win32 // mutexes have no destroy mechanism. // // This optimization can't be performed on Apple platforms, where // pthread_mutex_destroy can allow the kernel to release resources. // See https://llvm.org/D64298 for details. // // TODO(EricWF): Enable this optimization on Bionic after speaking to their // respective stakeholders. #if (defined(_LIBCPP_HAS_THREAD_API_PTHREAD) && defined(__GLIBC__)) \ || (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) \ || defined(_LIBCPP_HAS_THREAD_API_WIN32) # define _LIBCPP_HAS_TRIVIAL_MUTEX_DESTRUCTION #endif // Destroying a condvar is a nop on Windows. // // This optimization can't be performed on Apple platforms, where // pthread_cond_destroy can allow the kernel to release resources. // See https://llvm.org/D64298 for details. // // TODO(EricWF): This is potentially true for some pthread implementations // as well. #if (defined(_LIBCPP_HAS_THREAD_API_C11) && defined(__Fuchsia__)) || \ defined(_LIBCPP_HAS_THREAD_API_WIN32) # define _LIBCPP_HAS_TRIVIAL_CONDVAR_DESTRUCTION #endif // Some systems do not provide gets() in their C library, for security reasons. #if defined(_LIBCPP_MSVCRT) || \ (defined(__FreeBSD_version) && __FreeBSD_version >= 1300043) || \ defined(__OpenBSD__) # define _LIBCPP_C_HAS_NO_GETS #endif #if defined(__BIONIC__) || defined(__NuttX__) || \ defined(__Fuchsia__) || defined(__wasi__) || \ defined(_LIBCPP_HAS_MUSL_LIBC) || defined(__OpenBSD__) #define _LIBCPP_PROVIDES_DEFAULT_RUNE_TABLE #endif #if __has_feature(cxx_atomic) || __has_extension(c_atomic) || __has_keyword(_Atomic) # define _LIBCPP_HAS_C_ATOMIC_IMP #elif defined(_LIBCPP_COMPILER_GCC) # define _LIBCPP_HAS_GCC_ATOMIC_IMP #endif #if !defined(_LIBCPP_HAS_C_ATOMIC_IMP) && \ !defined(_LIBCPP_HAS_GCC_ATOMIC_IMP) && \ !defined(_LIBCPP_COMPILER_MSVC) && \ !defined(_LIBCPP_HAS_EXTERNAL_ATOMIC_IMP) # define _LIBCPP_HAS_NO_ATOMIC_HEADER #else # ifndef _LIBCPP_ATOMIC_FLAG_TYPE # define _LIBCPP_ATOMIC_FLAG_TYPE bool # endif # ifdef _LIBCPP_FREESTANDING # define _LIBCPP_ATOMIC_ONLY_USE_BUILTINS # endif #endif #ifndef _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK #define _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK #endif #if defined(_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS) # if defined(__clang__) && __has_attribute(acquire_capability) // Work around the attribute handling in clang. When both __declspec and // __attribute__ are present, the processing goes awry preventing the definition // of the types. In MinGW mode, __declspec evaluates to __attribute__, and thus // combining the two does work. # if !defined(_MSC_VER) # define _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS # endif # endif #endif #ifdef _LIBCPP_HAS_THREAD_SAFETY_ANNOTATIONS # define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) __attribute__((x)) #else # define _LIBCPP_THREAD_SAFETY_ANNOTATION(x) #endif #if _LIBCPP_STD_VER > 17 && (!defined(_MSC_VER) || _MSC_VER >= 1929) # define _LIBCPP_CONSTINIT constinit #elif __has_attribute(require_constant_initialization) # define _LIBCPP_CONSTINIT __attribute__((__require_constant_initialization__)) #else # define _LIBCPP_CONSTINIT #endif #if !__has_builtin(__builtin_is_constant_evaluated) || (defined(_LIBCPP_COMPILER_GCC) && _GNUC_VER < 900) || __CUDACC_VER_MAJOR__ == 10 #define _LIBCPP_HAS_NO_BUILTIN_IS_CONSTANT_EVALUATED #endif #if __has_attribute(diagnose_if) && !defined(_LIBCPP_DISABLE_ADDITIONAL_DIAGNOSTICS) # define _LIBCPP_DIAGNOSE_WARNING(...) \ __attribute__((diagnose_if(__VA_ARGS__, "warning"))) # define _LIBCPP_DIAGNOSE_ERROR(...) \ __attribute__((diagnose_if(__VA_ARGS__, "error"))) #else # define _LIBCPP_DIAGNOSE_WARNING(...) # define _LIBCPP_DIAGNOSE_ERROR(...) #endif // Use a function like macro to imply that it must be followed by a semicolon #if _LIBCPP_STD_VER > 14 && __has_cpp_attribute(fallthrough) # define _LIBCPP_FALLTHROUGH() [[fallthrough]] #elif __has_cpp_attribute(clang::fallthrough) # define _LIBCPP_FALLTHROUGH() [[clang::fallthrough]] #elif __has_attribute(__fallthrough__) # define _LIBCPP_FALLTHROUGH() __attribute__((__fallthrough__)) #else # define _LIBCPP_FALLTHROUGH() ((void)0) #endif #if defined(_LIBCPP_COMPILER_CLANG_BASED) # define _LIBCPP_REINITIALIZES_OBJECT [[clang::reinitializes]] #else # define _LIBCPP_REINITIALIZES_OBJECT #endif #if __has_attribute(__nodebug__) && !defined(__CUDACC__) #define _LIBCPP_NODEBUG __attribute__((__nodebug__)) #else #define _LIBCPP_NODEBUG #endif #if __has_attribute(__standalone_debug__) #define _LIBCPP_STANDALONE_DEBUG __attribute__((__standalone_debug__)) #else #define _LIBCPP_STANDALONE_DEBUG #endif #if __has_attribute(__preferred_name__) #define _LIBCPP_PREFERRED_NAME(x) __attribute__((__preferred_name__(x))) #else #define _LIBCPP_PREFERRED_NAME(x) #endif // We often repeat things just for handling wide characters in the library. // When wide characters are disabled, it can be useful to have a quick way of // disabling it without having to resort to #if-#endif, which has a larger // impact on readability. #if defined(_LIBCPP_HAS_NO_WIDE_CHARACTERS) # define _LIBCPP_IF_WIDE_CHARACTERS(...) #else # define _LIBCPP_IF_WIDE_CHARACTERS(...) __VA_ARGS__ #endif #if defined(_LIBCPP_ABI_MICROSOFT) && \ (defined(_LIBCPP_COMPILER_MSVC) || __has_declspec_attribute(empty_bases)) && \ !defined(__CUDACC__) # define _LIBCPP_DECLSPEC_EMPTY_BASES __declspec(empty_bases) #else # define _LIBCPP_DECLSPEC_EMPTY_BASES #endif #if defined(_LIBCPP_ENABLE_CXX17_REMOVED_FEATURES) #define _LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR #define _LIBCPP_ENABLE_CXX17_REMOVED_BINDERS #define _LIBCPP_ENABLE_CXX17_REMOVED_RANDOM_SHUFFLE #define _LIBCPP_ENABLE_CXX17_REMOVED_UNEXPECTED_FUNCTIONS #endif // _LIBCPP_ENABLE_CXX17_REMOVED_FEATURES #if defined(_LIBCPP_ENABLE_CXX20_REMOVED_FEATURES) #define _LIBCPP_ENABLE_CXX20_REMOVED_ALLOCATOR_MEMBERS #define _LIBCPP_ENABLE_CXX20_REMOVED_BINDER_TYPEDEFS #define _LIBCPP_ENABLE_CXX20_REMOVED_NEGATORS #define _LIBCPP_ENABLE_CXX20_REMOVED_RAW_STORAGE_ITERATOR #define _LIBCPP_ENABLE_CXX20_REMOVED_TYPE_TRAITS #endif // _LIBCPP_ENABLE_CXX20_REMOVED_FEATURES #if !defined(__cpp_impl_coroutine) || __cpp_impl_coroutine < 201902L #define _LIBCPP_HAS_NO_CXX20_COROUTINES #endif // Yandex-specific: We build our own libc++, so it has everything available #define _LIBCPP_DISABLE_AVAILABILITY // End of Yandex-specific #if defined(_LIBCPP_COMPILER_IBM) || defined(__CUDACC__) #define _LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO #endif #if defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) # define _LIBCPP_PUSH_MACROS # define _LIBCPP_POP_MACROS #else // Don't warn about macro conflicts when we can restore them at the // end of the header. # ifndef _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS # define _LIBCPP_DISABLE_MACRO_CONFLICT_WARNINGS # endif # if defined(_LIBCPP_COMPILER_MSVC) # define _LIBCPP_PUSH_MACROS \ __pragma(push_macro("min")) \ __pragma(push_macro("max")) # define _LIBCPP_POP_MACROS \ __pragma(pop_macro("min")) \ __pragma(pop_macro("max")) # else # define _LIBCPP_PUSH_MACROS \ _Pragma("push_macro(\"min\")") \ _Pragma("push_macro(\"max\")") # define _LIBCPP_POP_MACROS \ _Pragma("pop_macro(\"min\")") \ _Pragma("pop_macro(\"max\")") # endif #endif // defined(_LIBCPP_HAS_NO_PRAGMA_PUSH_POP_MACRO) #ifndef _LIBCPP_NO_AUTO_LINK # if defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) # if !defined(_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS) # pragma comment(lib, "c++.lib") # else # pragma comment(lib, "libc++.lib") # endif # endif // defined(_LIBCPP_ABI_MICROSOFT) && !defined(_LIBCPP_BUILDING_LIBRARY) #endif // _LIBCPP_NO_AUTO_LINK // Configures the fopen close-on-exec mode character, if any. This string will // be appended to any mode string used by fstream for fopen/fdopen. // // Not all platforms support this, but it helps avoid fd-leaks on platforms that // do. #if defined(__BIONIC__) # define _LIBCPP_FOPEN_CLOEXEC_MODE "e" #else # define _LIBCPP_FOPEN_CLOEXEC_MODE #endif #ifdef _LIBCPP_COMPILER_MSVC #define _LIBCPP_BUILTIN_CONSTANT_P(x) false #else #define _LIBCPP_BUILTIN_CONSTANT_P(x) __builtin_constant_p(x) #endif // Support for _FILE_OFFSET_BITS=64 landed gradually in Android, so the full set // of functions used in cstdio may not be available for low API levels when // using 64-bit file offsets on LP32. #if defined(__BIONIC__) && defined(__USE_FILE_OFFSET64) && __ANDROID_API__ < 24 #define _LIBCPP_HAS_NO_FGETPOS_FSETPOS #endif #if __has_attribute(init_priority) // TODO: Remove this once we drop support for building libc++ with old Clangs # if (defined(_LIBCPP_CLANG_VER) && _LIBCPP_CLANG_VER < 1200) || \ (defined(__apple_build_version__) && __apple_build_version__ < 13000000) # define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(101))) # else # define _LIBCPP_INIT_PRIORITY_MAX __attribute__((init_priority(100))) # endif #else # define _LIBCPP_INIT_PRIORITY_MAX #endif #if defined(__GNUC__) || defined(__clang__) // The attribute uses 1-based indices for ordinary and static member functions. // The attribute uses 2-based indices for non-static member functions. # define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) \ __attribute__((__format__(archetype, format_string_index, first_format_arg_index))) #else # define _LIBCPP_ATTRIBUTE_FORMAT(archetype, format_string_index, first_format_arg_index) /* nothing */ #endif #if __has_cpp_attribute(msvc::no_unique_address) // MSVC implements [[no_unique_address]] as a silent no-op currently. // (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.) // However, MSVC implements [[msvc::no_unique_address]] which does what // [[no_unique_address]] is supposed to do, in general. // Clang-cl does not yet (14.0) implement either [[no_unique_address]] or // [[msvc::no_unique_address]] though. If/when it does implement // [[msvc::no_unique_address]], this should be preferred though. # define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]] #elif __has_cpp_attribute(no_unique_address) # define _LIBCPP_NO_UNIQUE_ADDRESS [[no_unique_address]] #else # define _LIBCPP_NO_UNIQUE_ADDRESS /* nothing */ // Note that this can be replaced by #error as soon as clang-cl // implements msvc::no_unique_address, since there should be no C++20 // compiler that doesn't support one of the two attributes at that point. // We geenrally don't want to use this macro outside of C++20-only code, // because using it conditionally in one language version only would make // the ABI inconsistent. #endif #if __has_cpp_attribute(msvc::no_unique_address) // MSVC implements [[no_unique_address]] as a silent no-op currently. // (If/when MSVC breaks its C++ ABI, it will be changed to work as intended.) // However, MSVC implements [[msvc::no_unique_address]] which does what // [[no_unique_address]] is supposed to do, in general. // Clang-cl does not yet (14.0) implement either [[no_unique_address]] or // [[msvc::no_unique_address]] though. If/when it does implement // [[msvc::no_unique_address]], this should be preferred though. # define _LIBCPP_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]] #elif __has_cpp_attribute(no_unique_address) # define _LIBCPP_NO_UNIQUE_ADDRESS [[no_unique_address]] #else # define _LIBCPP_NO_UNIQUE_ADDRESS /* nothing */ // Note that this can be replaced by #error as soon as clang-cl // implements msvc::no_unique_address, since there should be no C++20 // compiler that doesn't support one of the two attributes at that point. // We generally don't want to use this macro outside of C++20-only code, // because using it conditionally in one language version only would make // the ABI inconsistent. #endif #ifdef _LIBCPP_COMPILER_CLANG_BASED # define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("clang diagnostic push") # define _LIBCPP_DIAGNOSTIC_POP _Pragma("clang diagnostic pop") # define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(clang diagnostic ignored str)) # define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) #elif defined(_LIBCPP_COMPILER_GCC) # define _LIBCPP_DIAGNOSTIC_PUSH _Pragma("GCC diagnostic push") # define _LIBCPP_DIAGNOSTIC_POP _Pragma("GCC diagnostic pop") # define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) # define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) _Pragma(_LIBCPP_TOSTRING(GCC diagnostic ignored str)) #else # define _LIBCPP_DIAGNOSTIC_PUSH # define _LIBCPP_DIAGNOSTIC_POP # define _LIBCPP_CLANG_DIAGNOSTIC_IGNORED(str) # define _LIBCPP_GCC_DIAGNOSTIC_IGNORED(str) #endif #endif // __cplusplus #endif // _LIBCPP_CONFIG